Drum washing machine



FIG. 1 is a front, right perspective view of the drum washing machine showing my new design;

FIG. 2 is a front view thereof,

FIG. 3 is a rear view thereof,

FIG. 4 is a left side view thereof,

FIG. 5 is a right side view thereof,

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a perspective view showing the door in an open position. 

The ornamental design for a drum washing machine, as shown and described. 